Typical operating characteristics (continued) – Rainbow Electronics MAX1855 User Manual
Page 9
MAX1716/MAX1854/MAX1855
High-Speed, Adjustable, Synchronous Step-Down
Controllers with Integrated Voltage Positioning
_______________________________________________________________________________________
9
-3
-1
-2
1
0
2
3
0
1.0
1.5
0.5
2.0
2.5
3.0
CURRENT-LIMIT ERROR vs. V
ILIM
V
ILIM
(V)
ERROR (%)
MAX1716-18
0
1.0
0.5
2.5
2.0
1.5
4.0
3.5
3.0
4.5
0
8
4
12
16
20
24
CONTINUOUS-TO-DISCONTINUOUS
INDUCTOR CURRENT POINT
V
BATT
(V)
OUTPUT CURRENT (A)
MAX1716-19
CIRCUIT#1
V
OUT
= 1.6V
CIRCUIT#2
V
OUT
= 1.3V
CIRCUIT#3
V
OUT
= 1.0V
0
5
15
10
20
25
INDUCTOR CURRENT PEAKS AND
VALLEYS vs. BATTERY VOLTAGE
INDUCTOR CURRENT (A)
MAX1716-20
0
8
4
12
16
20
V
OUT
= 1.3V
CIRCUIT#2 (L = 1
µH)
24
I
PEAK
I
VALLEY
V
BATT
(V)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
8
4
12
16
20
24
NO-LOAD SUPPLY CURRENT
vs. BATTERY VOLTAGE
V
BATT
(V)
SUPPLY CURRENT (mA)
MAX1716-21
SKIP MODE
550kHz (TON = GND)
CURCUIT#2 (L = 0.68
µH)
I
CC
+ I
DD
I
BATT
0
10
5
20
15
25
30
MAX1716-22
0
8
4
12
16
20
24
NO-LOAD SUPPLY CURRENT
vs. BATTERY VOLTAGE
V
BATT
(V)
SUPPLY CURRENT (mA)
PWM MODE
550kHz (TON = GND)
CURCUIT#2 (L = 0.68
µH)
I
CC
+ I
DD
I
BATT
0
4
2
8
6
12
10
14
MAX1716-23
0
8
4
12
16
20
24
NO-LOAD SUPPLY CURRENT
vs. BATTERY VOLTAGE
V
BATT
(V)
SUPPLY CURRENT (mA)
PWM MODE
200kHz (TON = V
CC
)
CURCUIT#2 (L = 1.5
µH)
I
CC
+ I
DD
I
BATT
B
10A
0
20A
1.55V
1.60V
1.50V
A
40
µs/div
A. V
OUT
= 1.6V, 50mV/div; B. I
OUT
= 1.3A TO 18A, 10A/div;
CIRCUIT #1, V
BATT
= 15V, PWM MODE
LOAD-TRANSIENT RESPONSE
(V
BATT
= 15V, PWM MODE)
MAX1716-24
B
10A
0
20A
1.55V
1.60V
1.50V
A
40
µs/div
A. V
OUT
= 1.6V, 50mV/div; B. I
OUT
= 0.3A TO 18A, 10A/div;
CIRCUIT #1, V
BATT
= 15V, PWM MODE; VPS = PGND
LOAD-TRANSIENT RESPONSE
WITH DISABLED VOLTAGE POSITIONING
MAX1716-25
Typical Operating Characteristics (continued)
(Circuit from Figure 1, components from Table 2, T
A
= +25°C, unless otherwise noted.)